| 单词 | epitrochoidal |
| 释义 | > as lemmasepitroˈchoidal epitroˈchoidal adj. of or pertaining to an epitrochoid. ΘΚΠ the world > movement > motion in a certain direction > movement in circle or curve > [adjective] > curved (of movement) > specific type of curve epitrochoidal1800 1800 Philos. Trans. (Royal Soc.) 90 149 Epitrochoidal curves, formed by combining a simple rotation or vibration with other subordinate rotations or vibrations. 1843 Penny Cycl. XXV. 284/2 Every direct-epicycle planetary system is both epitrochoidal and externally hypotrochoidal. 1959 Times 15 Dec. 7/1 The shape of the bore in which the triangular rotor revolves is described as epitrochoidal: the shield-shaped piston moves round the inside of a cavity like the hollow skin of an Edam cheese. 1969 Observer 23 Mar. (Colour Suppl.) 27/1 Take the revolutionary Wankel engine. Twin rotors in an epitrochoidal bore. That's two rotors going round and round, instead of four or more pistons going up and down. < as lemmas |
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